问题
How to add css class to the body tag on specific route? I tried to use body tag in a handlebars template but didn't work...
Update: After some googling I came with this solution. Not sure that this is the best way to do this, but it works.
App.SomeRoute = Em.Route.extend
activate: ->
Em.$('body').addClass 'some-class'
deactivate: ->
Em.$('body').removeClass 'some-class'
来源：https://stackoverflow.com/questions/20781154/add-css-classes-to-body-in-ember-js